Yeah thats right, I have the same mobo ( S3 version as opposed to DS3 ) and don't have bios beeps because my Thermaltake Tsunami didn't come with a speaker.
I had the same problem with my board not posting from cold boot sometimes, The way i solved it was by removing the GFX card and PCI devices, in this case just a TV card, then clearing CMOS and replacing the GFX and PCI cards.
All in all I've had a problem where the S3 wouldnt post on about 5 seperate occasions, and each time I've had to clear CMOS. The only difference between the S3 and DS3 is the lan controller and the use of solid capacitors on the DS3. If you do manage to boot into windows then use the BIOS flash program on the mainboard CD, Qflash i think its called to update to a fresher BIOS.
Additionally, my board has BIOS f3, and i think the current release is f6 or f8. So that could be you problem. Good luck gettin sorted m8.